Sorry to feel that the "user interface file" with "windefault" was far more user friendly than the current one (default). I tried the other one's with no upgrade.
I tried to use "wintoolbars.ui" without success getting an error requiring to "check the configuration". Is there a way to use "windefault.ui" from LyX 1.4.1 into 1.4.3.... there is some controls like Bf, dvi, pdf->latex which are quite agreable and efficient. Also the buttons spread over two lines are quickly accessible in regards of one line in 1.4.3. Thanks Paul